Hydraulic motor.



No. 643,83l. 'Patented Fem 2o, mio.

.L suupr.

HYDRAULIC MUTUI?.

(Application :ma im 15, 1996.)

*(Iln Model.) 9 Sheets-Sheet l,

fill/11111,

A ma,

j2me/2F30? no. .$43,831. Patented rgb; 2o, leon.

. J. STUIPF.

HYDRAULIC IUTUR.

. l (Apbumion med D. 15,1596.)

(llo Model.)

l s Smets-snm 2Q No. 643,83l.

Patented Feb. 20, |900. J. STUHPF. HYDRULIG IDTOR. (Appucmn am; me'. 15, lans.)

(nu Model.)

D Sheets-Sheet 3.

dwf...

No. 643,83I. Patented Feb. 2()7 i900.

l .1. sTulwPF.l HYDRAULIC MOTUR.

(Application med Dec. 15, 1896.)

9 Sheets-Sheet 4.

(No ModeL);

Patented Feb. 2D, |900. J. STUMPF.

HYDRAULIC MDTDR.

(Application led Dec. 15, 1896,)

9 Sheets-Sheet 5,

No. 643,831. v Patented Feb. 20, |900.

` J. STUMPF.

HvunAuLlc noTo. (Application filed Dec. l5, 1896.)

(No Model.) 9 Sheefx-Shset Patented Feb. 2u, i900.

No. s4a,a3|.-

J STUMPF HYDRAULIC MOTOR.

(Appncaeion med nec. 15, 180s.) (No Model.)

I 9 SheetsfSheet 8.

@ven- 27am No. 643,831. Patented Feb. 20, |900.

^ J. STUMPF.

- HvnnAuLlc no'r'on.

l (Application me@ nec. 15, lese.) lo Model.) 9 Sheets-Sheet 9.

UNITED STATES ParaNT lV Grafica@ '.ionN s'rUMPF, or CHICAGO, ILLINOIS.k

HYDRAULIC MOTOR.

SPECIFICATION formingcpm of Letters Patent No. 643,831, dated february2o, i900.v if'.

ippucauonflieanecember15,1896. serinirmaiasoi. (Nmodel.)

To LZ-Z whom, it Wray concern:

Be it known that I, JOHN STUMPF, a subject i ments in the-constructionand operation 'of' the valves, which control the flow of the water,whereby they will be quick and positive in their seating andunseatingmovements and free from all danger of sticking, all to the endof rendering the motor quickly responsive to its motive power,easy-running, and noiseless.

In carrying out my invention I provide the l inlet and ontlet ports ofthe motor chamber or4 chambers with val ves 'which lift or open away,from their seat-s in the direction opposite to the lioW of the water.The valves are closed by means of mechanical valve-closing devices,which operate toscat the inlet-Valve of a motor-chamber just before,.the end of the stroke of the plunger under the force of the incomingwater and to seat the outletvalve just before the end of thedischargestroke ot' the plunger, whereby the further travel of theplunger in the first said instance will produce suction 'in the chamberto act against the outlet-valve and open the same and in the second saidinstance will etfect increased pressure in the chamber to act againstthe inlet-valve and open the same.

My invention, generally stated, consists, first, in a constructionothydraulic-m'otorvalve-operating means,\vhereby either the inlet oroulet Valve, or both, are closed by mechanical valve-closing means andopened by a top planv View of a double hydraulic, mo fr showing insection, a singlejhydraulic motor constructed with f my irnproyem'entsland geared to a pump which-itgisintended toop erate; Figs. la andlb,.enlargedl brokense tions on linesland'lhof,Fig.fl.;1Fig.2,a

I broken top plan View of themotorandjpump shown in Fig. l; Fig.3,4aebroken yiewgslrowy ing a single hydraulic motor of-zthe.diIIe/relintial type constructed with. my, improvements,

the motor being in section and Athe pompt which it is geared beinginreleyation; lil-ige geared to and operating adou ble pump;,lilig 5, abroken View showing the samein. side. elevation; Fig. o, an enlargedbroken View,

partly in section, the section being taken on line 6 of Fig.` 4 andviewedvin the direction of the arrow; Figs. 7 and, enlarged sectionstaken onlines 7 and 8.0i Fig.,4.; ,Fig.- 9,

broken view showingv in sectionla{double}Inno, i tor of the diiferentialtype gearedtoapump,

which is shown in broken, side eleyartion; rand Fig. l0, a brokendiagrammatic yiew showing my improvementsL applied to amine. Y.:

IieifemringV to Fig. lamas the Ashafn-fora the surface of the mine; A,a'rhydrauliomon.

suppl'y.pipe extending from-thepu mp or snp- B2 a discharge-pipeextendingfilomrthepump B to the Surface ofthe mineg Y' In each of themotors -plier down the shaft T to the motor A,.arrd

drawings the water which operates the Inachine enters an air-chamber atvtliseglcpwer side andpassesout at the 'Loper-upper side. Theinlet-ports are at` the lower sides o t'; the piston chambers orcylinders and 4the outlet-ports at the upper sides thereof. Allthevalves,both v, nc inlet and outlet, at the `piston,chambers or cylindersopen by movingfromtheir seatsA in the direction from whichthewatenilowsand are provided with valve-,closing means oithe same character,butvarying in speciejeon.

struction in accordancek with,requirements;

Referring to allthecolnstructions, A-is-the hydraulic motor, andrb thepump, Eachmotor is provided at itsunderl Side with an fairchamber. A',comm'unicatingl toward itslower Y, i,

with one or more hand-holes havingreniovf side with westerly-piper and.provista 5 the cups p' p3 is a stili.e spring p5.

able covers Z. The single inotors illustrated in Figs. 1', 2, and 3 haveas'lngle piston chamber or cylinder E, -while t e double motors.illustrated in the'remaining figures have two 5 piston chambers orcylindersEand E. Working in the cylinders are pistons F on stems F',which pass through stuffing-boxes i in the cylinder-heads and throughstuffing-boxes B at the pumps B, the stems being also the Io stems ofthe pistons of the pumps Bland suitably constructed for that purpose.The dif ferential motors are provided at their cylinders with' a singleinlet-port s at the lower A side and a single outlet-port s' at theupper t 5 side, the opposite end of the chamber or cylinder beinglxinopen communication with the air-chamber A' through a port 1. In theother motors illustrated each of the cylinders or chambersE'E' isprovided at its lower side zo with two inlet-ports s, communicating withthe air-chamber A', and at its upper' side with two outlet-ports s'. atvits lower or outer side affords a val've-seat sf, and eachoutle't-ports. at its ltver or inner side affords a valve-seat s3. E ch of theper-ts ss' is formed of a casting having an #outer ring, securedin theopening through the cylinder-shell and a spider having a centralsleeves@ -At eachinlet-port is an inlet- 3o valve G, opening downward orin the outward direction with relation to vthe cylinder 'or chamber Eand closing upward against the -seat s, and at each o1tletpor`t-- s' isan" inwardly-opening valve H, which clois upward against the seat s3; I

Referring in detail that to the motor shown in Figs. .l and 2, thechamber or cylinder E vis provided at opposite end portions with inletand outlet ports ss', as described', the pis- 4o ton F working in thecylinder between the end portions thereof.' On. the piston-stem F' inthe positions shown are stops or heads q q', preferably in the form of'disksl and in the cylinder-heads at opposite ends of the cham- 45 ber Eare dash-pots q2 q2, which the heads or disksq q'enter as the pistonnears the end of itsstroke. The valves G are formed with upward orinwardly projecting stems-p, which pass through the guide-sleeves s. Onthe up- 5o--per end of each stemp is a cup p', held in place by a nntp.Below the cup p andv sliding upon the stem 1) is a cup or engaging piecep3, provided with a circumferential fiange'p. Surrounding the stem andconfined between (See Fig. 1".) The under side of the cupps is providedwith a recess p, which fits loosely over the top of the sleeve s4,whereby when 'thevalve G opens 'the movement of the recessjo6 over 6othe end of the guide-sleeve s4 operates -as a dash-pot'to preventshock.Each val ve l-I has a. stem fn passing through it and to which it issecured. The stem above or at. the-outer side of the valve works throughthe -sleeve s and is provided at its upper or outer end with a .cup n',held in place bya nut nl.. The'cupn' is adapted to fit over the upperend of the ad- Each inlet-port s jacent sleeve s* `and Aaffords.dash-'pot which neutralizes any shock uponvthe valve as the latteropens.

sleeve or engaging piece n3, which is pressed against a nut n* on thelower end of the stem by means of a stiff spring n, conti ned betweenthe sleeve and valve. At each valve H is a swinging valve-closer I inthe form of a bellvcrank lever, having the bifurcated finger m'(see'Fig.` 1*) and single downward-projecting finger m. The valve-closermay be mounted on a rock-shaft m2, pivoted at opposite ends in flangedplugs 'rna in the shell of the chamber. The bifurcated finger m bearsagainst the lower 'end of the flanged sleeve'ns on opposite sides of thenut n, and the finger m' extends downward into the path of a stop orshoulder g3I on the piston -stem F. In the chamber or cylinder at eachvalve G is a valvel closer I' in the form of abell-'crank lever, l

mounted upon a rock-shaft in the same way as the valve-closer l andhaving a-single upward-projecting finger Zand a bifurcated finger l',which loosely embraces the cup p3 and bears against the under side ofthe flange p4 at opposite sides ofthe cup. The finger Z at the valve Gto the right inFig. l projects upward into the-'path of the stop q, andthe finger l at the valve G to theleft in Fig. 1 projects upward in tothe path of the stop q. Above or at the outer sides of thedischargevalves H are chambers K, which are shown open at the top and incommunication through a pipe K. K2-is the outlet-pipe. Should the ipe K2extend to any material distance beow the level of the chamber orcylinder E, the tops of the chambers K'may be closed in order that thesiphoni ng power of the `outflowing water may be utilized.

Where myimproved motoris to be employed in a mine, it may be located atthe bottom of -the mine, and the pipe C would extend up the shaft andconnect with a hydraulic pump at the surface of the mine, as shown, forexample, in Fig. 10. Water forced from the surface-pump downward throughthe pipe C enters the air-chamber A. In order that the motor may beinitially started, I provide at cach valve Ga priming and startingpassage k, extending from the air-chamber A' to tlie cylinder orpiston-chamber above the valve G. At each passage k is a valve k', whichmay be opened andclosed at will. Each valve k' is provided with anoperating-handle k2, which, if desired, may be in the form of apulley-wheel, (see Figs. 4, 5,*and 10,) around which operating-ropes a:w' may extend to thc surface of the mine, so that the valves may beoperated freni` the surface in the event that the mine is flo ded. Tostart the motor, oneyalve k' is opened to`\allow the water underpressurel to enter oneend of. the cylinder and force the piston F to theopposite end. ,That valve is then closed andthe otherophn ed7 ifnecessary, to force the piston in the contrary direction to the end .ofits stroke, after Loose upon the stem n below or at the inner side ofthevalve H is a flanged which the last-named valve is closed and the motoris in operation. Fig. I shows the valve v.G to the vleft open, the valve.G to the right closed, the valve H to the left closed, and the 5 valveH to the right open, and the piston F moving inthedirection o-i thearrow. As' the `disk or head q nears the respective dash-pot q2 the diskor head q' engages the finger l at )the open valve G, and the stop g3engages the lfinger m' at the open valve H.' In the further movement ofthe piston F and attendantparts the said linger Z is swung toturn itscompanion oilurcated linger Z' upward, v whereby it raises the valve. Gto its seatat the' Sametime as ititravels beyond theclosingpoint,compre'ssing the springp. The engagement of the stop g3with -the finger m' at the open valve I -I'causes the bifurcated fingerm to engage the sleeve n3 and'lift the said valve H to its seat at thesame time as it travels beyond the closing point, compressing the spring71,5. v The said v alvesG H are closed just before the piston reachesthe end of its stroke, Vwhereby init-s further ytravel it elects asuction action' in the chamber to the left of the piston and a.,preponderance of pressure in the chamber to the right of the piston.Therefore as soon as the said valves G andH are closed,

as described, pressure being raised abovek the jopenJlthe shock in itsopening'being neutralvized bythe dash-pot at p6, as b efo1'e4lescribed.vAtfthe same time the pressure being reduced low the othervalve H causesthe latter to drop and open, the shockinopening being neutral` yized bythe dashpot atn. The water under pressure from the air-chamber A thenenters .through theport s to the' rightin-Fig, 1 and moves. the piston Fto the left in Athat ligure, While the water in the chamber to the leftof the piston is discharged 7past the then openvalve H. Just after thepiston starts' tothe left the respective stops q 3 release engagementwith the respective mec anical valveLclosers I Ir, the closed .valve I-Iremaining closed under the pressure in the vcylinder and Athe closedvalveG remaining closed underthe superior pressure in theair-cliamber;As the disk g nears the -respective dash-pot q2 the stop 'qa to the leftof the piston Ystri-kes the finger m in its path to close the4respective valve H, and the stop or disk qvstrilres the finger Z in itspath,'closingthe respective valve G. Thus the reciprocation of thepiston F is coutinu- A ous, and its slight further travel-after ,the re.speetive valves are closed causes the other Y valve.' II to be opened bysuction and. the other'. Valve G to be opened. by. pressure inlepistonchamber. Y, The watery discharged .into thechaf'mbr Ktiowsfout-atthe pipelK .The.-dash-:pots g2 Ivneutralize all shock .upon

`. th e .pi ston a adattendan t` parts, when through inertaredherwise,thepiston more? W01' grond; "he intended Auma .ef/ns 'were i valvesmayjopen by gravity-iin @notions shown, ,their opening "is other valve Gcauses thev latter-to drop andv at the opposite end portion ofthecylinder bequickened by the inertia of the pistomwhich, howeverslight', tends after.. an .inlet-valve iis closed to create a relative;vacuum below the 7o adjaeentvalveI-I, andV after anontlet-valve isclosedto effect a `relativelyferrcessivepressure against the upperside'ol .the adjacent 1 inlet-valve. This construction,involving-thedownwardly-opening valves with mechanical 75 valve-closing meansVoperating in the movementof the piston, ao'rdsa particularly-positiveand smooth-running motora, .qMry princifpal object in providing theinlet-valves 'at lower side and the outlet-valves at theiup'per 8o sideof the piston-chamber is, tcaprovide .an upward course for the tva-ten,which lwill expelall air, and'` the par-ts v'arefso constructed .25athatno space canexist inthe pistomchamber for the accumulationandstorage @tain-which 85 by its expansion andcontractionfwould: rem derthe motor more orlessinoperati-ve When the motor andpumpshcrmaar .e.ployed in a mine', thea force? which; operates the` surface and theweightrotgthe waterscolumu in the fpi'pe C, less cticnm-,AMthe .Weightof the watercolu mn gwquldggivepower, f more-Tor less, nearly-'suicientt isethe same amount of' water ,totthesurface 0 il? 95 mine, the greaterpart ot`the,powerggcpntrilifuted-'bytlrepnmpatthe surfacejmay beutilized to pump addi-tiolnal waterffrom thenilreg In practice the pipe2 may lead tti-Lilia-rlgl'et- 4'chamber of the pump orto-'the siinigpfhole, roo 'from which the pump Bv sukslwgater;

1 In the differential moto'r shown iri.l`i,@f. 3`

stem E of the piston Eis pro\ided.at g th ton with a stop q? and 'atitsinner.end,l disk q, adapted to Work-inthedasbpo Athe end of the-chambercr cylinder, T

let-valve G, outlet-valve H, and: mec h:5|.i1ical .vglVe-closers I I'arethe -Sifllfalstinf Figc. The piston F is of' substantiallythe'sarnecpnstruction as lthat en iployedv in,., d iffe1e 1 itial uo pumps, and aknowledge Aof the'wor ng` cada dilerentialpu rnp, in view olgfxthe: boyplanation inconnectiouj-with Fi der thefoperation of they dileregi alhere shown, clear.-. In the rupvement n ,piston to the left the diskgerstop g strik th tinge-r Z .before theoppositeeniofth i arrives atthe dashpotg?, adjace stuffing-box t. Turning of tli the'bifurcatedfinger l offri alare-closer, izo closes the valve 'G anefcaus'esthevalvpeto open. As the pressureinfthe,chamberE on the valveside; of' thepist the latter is mgved to therig @by pressureagainsttheringare ential pistonnntil the stopA .,ger m' .and closes V thevalyegval'VeG opens.-v ,Y lInthe;,construction show4 and 7,whi911l101w adouble tially the saine type as th",y .in "Fig .I, eac-l1 of 'thepist-onsF than-,the piston in the '.singl connected tiroughits pistonthe motor' would be the' force of thejpu'ngpxat' 9o l the pistons of adouble pump B. In these figures I'have not shown dash-pots q2, thoughthey may be provided, as in Fig. 1, if desired. As in a.- double motorit is desirable that the 5 mechanical valve-closers for the valves ofone .motor shall be geared to the other ufotor in .order that the motorsshall coperate and `work in unison',I have changed the valvefelosingmechanism for double motors from that shown and described in connectionwith 'the single motor to better adapt it tothe req'uirements.' Each ofthe inlet-valves G has a hollow outward or downward projecting stem orsleeve h, which vslides upon avertical :1 5 'guide-rod g,.fastened atits upper end inthe "15- has au upward or outward projecting stem f,

Y which slides through t-he adjacent stationary guide-sleeve sf and hasa reduced and threaded up r end por'tion f', presenting a shoulder f(See Fig. 6.) Loosely surrounding 3o the stem f is a flanged sleeve orbearingpiece f3, and screwed upon the upper end of the stem is a-flanged sleeve f4, which moves through'a guide-opening in a spider x2at the top of the motor-casing. Confined between the flanged sleevesf3f# is a-stii spring f5, whichtends t pressthe sleeve or bearing piece fsdown against the shoulder f2. Extending through the "shell of theair-cham: ber A' at each valve G is a rock-shaft e, jou r- 4o naled in asuitable stuffing-box and-extending past the adjacent sleeve h. Firmlysecured toeach rock-shaft eis a bifurcated lever or finger e', whichstraddles the adjacent nut h* and bears against the under surface of theflange h3. of-the sleeve h2. Extending through the shell of each motor,above each outlet-valve H, is a rock-shaft d, suitably journaled' in astuin -box in the shell and carrying abifurcated ever or nger d! to en-'50 gage theunder surface of the bearing-piece fs` The shafts c d at queend of each motor are provided beyond the shell with bell-crank 'leverse d, and the other shafts e d are pro-A vided wth crank-arms e3 d3. Thecrank d on each side of the double motor is Ageared b means of aconnecting-rod d4 with one arm of' thefbell-crank lever d2 on the sameside, 4the other arm of the bell-crank lever being geared by a.connecting-rod d5 to one arm of 6o the bell-crank lever e2 on the samesidei, the other arm of th'ebellcrank lever e2 being geared to the crankeon that side by means of a connecting-rod e. Fixed' uponeach of thepiston-stems F' is a recessed collai` c..

Mounted in standards b b upon the motor-- frame is a rock-shaft b',having at one end a downward-projecting arm 112, which at its lower endenters and loosely engages one sleeve c at the recess in the latter. Onthe opposite end of the shaft b is a crank-arm b, 7o from which extendsa connecting-rod b,which at its opposite end is pivotally connected withthe crank d3 at one side of the double motor. Also mounted upon themotorframe ,are standards a a, in which is, journaled a rocli-- '75shaft a', having a downward-extending arm a2, which loosely engages therecess in the other sleeve c, the shaft a' carrying at its other end acrank a3, geared at its free end through the medium of a connecting-roda.4 8o

with the crank d3 on the side ofA the double motor opposite the crank dbefore mentioned. Thus lthe gearing is such .in each Ainstance that thecrank d3 on one motor is actuatedV from thepiston of the other motor.The gearing between each member of a set of valveclosing levers orfingers d e' is such that one lever-cil is raised while the other leverd is l lowered, and each valve-closing linger e' is moved at the sametime in the direction con- 9o trary to the lever d' directly above it.As the piston F of one motor moves to the left in Fig. 4 the piston ofthe other motor moves to the'rght. Thus as each piston-stem moves itcauses all the shafts d eof the other motor to be rocked. W'hen,f orexample, the shaft d to the left in Fig. 6 is rocked to the positionthere shown, its lever d engages the under surface of the bearing-piecef and raises it to seat 'the valve H, the sleeve f passing roo upwardthrough the guide m2. When the valve H is closed= any slight furthermovement of the lever d' willcompressthe springl f5. At the same timethe lever e' to the left in Fig. G-that is to say, at the sameend of :o5the cylinder--is rocked downward to the position shown, permitting thevalve G,'wi th its sleeve hand nut h, to descend until they are stoppedby impact against the rod-securing socketpiece 'at the bottom of theair-chamr 1o ber. At the same time the lever d' to the right in Fig. 6,or opposite end of the cylinder, is rocked downward,permitting the valveH at that end to descend, and the lever e'\at the same end is rockedupward to engage the I 15 flange ha` and lift the sleeves h h and valveG until the latter is closed, after which any further rise of the levere' will compress the spring h5. This opeling and closing of the valvescauses the wa er under pressure to rise."` 12o through the valve G,tothe left, and drive the piston in the direction of the arrow, the waterin the opposite e'nd of the cylinder escaping through the opeh valve H.A reversalof the movement of the piston F- is brought :"25 about by 'thenocki-ngfbf the lingers e' d' in the opposite directionfrom that stated,whereby the valve H to the right in Fig. 6 is closed by the lever d' andthe v-alve G at'the lsame end is opened, and the valve G to the left inthat 13o figure is closed, and the Ivalve H at the same end opens. Thusthe piston of onsmotor in bell-crank lever like the bell-crank lever d2.

described, and each shaft e is provided with a crank like -thexcrauk-c3described. On the" stem of each piston F is a recessed collar c, andsubstantially the same mechanism is em- -ployed as that described in theother double motor to rock the valve-closers. A

In my improved motor, whether single or double anddiierential or not,the inlet-valves opening outward and the outlet-valves opening inwardrequire mechanical means, as distinguished from the water-pressu re inthe cylinder, to'close them as the piston nears theend vof its-stroke,and the valves are opened 'by variations of duid-pressure in the cham.z5' ber, and m-yinvention is not to be limited to` the specificconstruction of the valves or valve-closers shown. In motors of certainconstructions-it may not be necessarythat both the inlet and outletvalves or all of them shall move Afrom their seats, though any suchvalve in al hydraulic motor opening in the direction from which thewiater flows and closed when thejpiston nears the end ofitsfstroke-by'm'e chanical valveclcgzing means, substantially asa-nd forthe purpose above described, would be within the -spirit of my invention. While the inlet-valves open in the outward direction and theoutlet-valves in the inward dil rection with relation to thepiston-chamber,

itis not essential that they shall move in avertical plane, thou gh thisconstruction is preferred, because it is believed to be more simple andavoids the necessary uselof springs for opening the valves.-zontally-moving valves which leave their seats may be substituted, ifdesired, for the vertically-movingvalves,shownandprovided, whenrequired, with springs to completely open tfhem. 4

It is desirable that the outlet-valves shall be closed, as stated,before'the piston'reaches the end of its stroke, so that the inlet valveIor valves may be quickly opened by the pressure produced by the pistonin its nal movement. In the construction shown I rely for the quickopening of the valves upon the inertia of the piston.A To increasetheinertia, the piston may be solid or hollow and lled, `as with water, togive it weight.

Obviously myimprovements, which are here shown in the form which I nowbelieve the most simple, may be variously modified with regard todetails of construction without departing from the spirit of myinvention as defined by the claims.

What I claim as new, and desire to secure by Letters Patent, is

More vor less horil. In a hydraulic motor, the combination with thepiston and piston-chamber having inlet and outlet ports, of anoutwardly-opening valve at the inlet-port with means for closing it, avalve governing the outlet-port and mechanical valve-closing meanstherefor operating to close the outlet-valve during the movement of thepiston toward the end of its discharge-stroke, whereby the inlet-valveis opened by the increase of pressure in the pis- Y ton-chamberresulting, from the further movement of thepiston after the outlet-valveisv closed, substantially as described. 2. In a hydraulic motor, thecombination with the piston and piston-chamber having inlet and outletports, of an outwardly-opening valve at the inlet-.port with means forclosing it, a valve governing the outlet-port Wi th mechanical valve-closing means therefor operating to close the outlet-valve during themovement of the piston toward the end of its discharge-stroke, wherebythe inlet-valve is opened by the increase of pressure in the piston-chamber resulting from the further movement of the piston after theoutlet-valve is closed, and means for cushioning the inletvalve in itsopening movement, substantially' as described.

3. In a hydraulic motor,I the combination with the piston andpiston-chamber having inlet and outlet ports, of an inwardly-openingvalve at the outlet-port withmeans for closing it, valve governing theinlet-port and mechanical valve-closing means therefor Y operating toclose the inlet-valve during the movement of the piston, whereby theoutletvalve is opened by the suction in the pistonchamber resulting fromthe further movement of the piston after the inlet-valve is A closed,substantially as described.

4. In a hydraulic motor, the combination with the piston andpiston-chamber having inlet and outlet ports, of an inwardly-openingvalve at the outlet-port with means for closing it, a valve governingthe inlet-port with mechanical valve-closing means therefor operating toclose the inlet-valve during the movement f the piston, whereby theoutlet-valve is opened by the suction in the piston-chamber resultingfrom the further movement of the piston after the inlet-valve is closed,and means for cushioning the outlet- Valve in its opening movement,substantially as described.

5. In a hydraulic motor, the combination with the piston andpiston-chamber having inlet and outlet ports, of lift-valves governingsaid ports, opening in the direction opposite to the How of the liquid,and mechanical valve-closing devices for the said valves operating toclose them alternately in the opposite movements of the piston towardthe ends of its strokes, whereby each valve is opened by the change ofpressure in the chamber resulting from the further travel of the pistonIIO izo

5. ln a hydraulic motor, the combination with the piston andpiston-chamber having' inlet and outlet ports, of lift-valves governingsaid ports, opening in the direction opposite to the iiow of the liquid,mechanical valve-closing devices for the saidvalves operatine to closethem alternately in the opposite movements of the piston toward the endsof its strokes, whereby each valve is opened. hy the change of pressurein the chamber resulting from-the further travel of the piston after theother valve is closed, and means for cushioningthe valves in theiropening movements, substantially as described.

7. A double hydraulic motor having, ln combination, two piston-chamberseach provided with an inlet-port at its lower side and an outlet-port atits upper side, and an outwardly-opening valve -at the inlet-port, apiston in each chamber, and 'mechanical valveelosing means at each saidvalve for closing the same, operatively connected with the piston in theother chamber to be actuated therehv, substantially as and for thepurpose set.

forth.

S. A double hydraulic motor having, in combination, two piston-chamberseach provided with an inlet-port at its lower side and an outlet-portat4 its upper side, and an inwardly-opening valve at the outlet-pont, apis'- 'ton in each chamber,V and mechanical valveclosing means at eachsaid valve for closing the saine, operatively connected with the pistonin the other chamber to be actuated thereby, substantially as and forthe purpose set forth. Y,

9. A double hydraulic motor having, in combination, two piston-chamberseach provided with an inlet-port at its lower side and an outlet-port atits upper side, an outwardlyopening valve at the Vinlet-port, and aninwardly-openingvalve at the outlet-port, a piston in each said chamber,and mechanicalA closing means for each said valve operatively connectedwith the piston in the other charnber and actuated thereby to close theinlet and outlet valves in leach said chamber alternntely, substantiallyas and for the purpose set forth.

1,0. ln combination, a water-pressure supplier, and a double hydraulicmotor having two piston-chambers each provided toward one end with aninlet-port, at the lower side, and an outlet-port, at the upper side,each said inlet-port and each chamber, toward its opposite end,communicating with said supplier, a differential piston in each chamber,valves at said ports, and mechanical valveclosers, at each valve,operatively connected with the sten in thel other chamber to be actuatedthereby to close the valves in each chamber alternately, substantiallyas and for the purpose set forth,

l1. 'In a hydr.v 'iiie motor, the combination, with the pistor nd thepiston-chamber having an inlet-pe?- p at its lower'sideand au.outiet-port at its opper side, of outwardlyopeningvalve the inlet-porthaving a stein, a bearing-piece on thestem and a spring contined betweenthe said piece and a stop on the stem, and a'piston-actuatedvalve-closer having a linger engaging the said piece, whereby in themovement of the piston toward the limit of its trav arse in onedirection, the said valve-closer, through the medium of the said pieceand spring presses the valve yeldingly to its seat, substantially as andfor the pur-I pose set forth.

12. In a hydraulic motor, the combination, with the piston and thepiston-chamber having an inlet-port at its lower side and an outlet-portat its upper side, of an inwardlyopening valve at the outlet-port havinga stem, a bearing-piece on the stem and a spring,Y confined between thesaid piece and a stop on the stem, and a'piston-aetuated valve-closervhaving a finger engaging ,the said piece, whereby in the movement ofthe piston toward the limit of its traverse in one direction, the saidvalve-closer, through themedi-um of the saidpiece andspring,.presses'the valvey yieldingly to itsseat, substantially as andfor the purpose set forth.

13. In a hydraulic motor, the combination, with the piston, andpiston-stein, and the piston-chamber having an inlet-port at its lowerside and an outlet-port at its upper side, of an outwardly-opening valveat the inlet-port, an inwardly'sppening Valve ai. the outlet-port, eachvalve ,being provided witha yielding bearing-piece, a stop movable withthe piston, a head on the piston-stem, a flash-pot in thepiston-chamber, inte which the said head. moves, and a valve-chisel' ateach valve having a finger engaging the yielding beari-1 piece on thevalve and a finger projecting ward the piston-stem, one into the path ofthe said moving stop, and the othe'r into t'nepath of the head, allconstructed and arranffed to operate substantially as and for thepi'rpose described.

In presence of# J. il. LEE, it. T. SPENCER.

'l OO Ilo

